The 3in1 program is a teaching and learning process by collaborating three presenters consisting of presenters from internal UB lecturers, presenters from practitioners according to the scientific field in each subject, as well as presenters from abroad. On this occasion, the Urban and Settlement Design Laboratory invited Assoc. Prof. Dr. Johannes Widodo from the National University of Singapore and practicing architect Ar. Prasetyo Adi, IAI, AP, GP next to the lecturer from the Department of Architecture FTUB Ir. Jenny Ernawati, MSP, Ph.D, CIQaR, CIQnR through the 3 in 1 2023 activity. This activity was held online in the form of a guest lecture for students of the FTUB Bachelor of Architecture Study Program, especially participants in the Basics of Urban Design 2, Architectural Design 5, and Basics courses Residential Design and City Landscape; and open to other FTUB Architecture academics. A series of guest lecture activities were held on several themes including: 1. Design of Tall Buildings in Complex City Areas; 2. Urban Village as A Pocket Space; 3. Locality of Urban Space; 4. Urban Injection; and 5. Complexity in Tall Building Design. This activity was held from September to October 2023, and was guided by Lecturers from the Department of Architecture as moderator, including Subhan Ramdlani, ST, MT, CIQaR, CIQnR, Ir. Muhammad Satya Adhitama, ST, M.Sc, CIQaR, CIQnR, Dr. Bayu Arief Firsandy, ST, M.Sc, and Adinda Christina, ST, M.Ars.